Wang（D3）の論文が Japanese Journal of Applied Physics に掲載

レーザーダイオードを用いた光音響測定による弾性細管に充填された2つの内容物の組成比の予測に関するWang (D3) の論文が   Japanese Journal of Applied Physics に掲載されました。

Kun Wang, Yuji Wada, Kentaro Nakamura. Estimation of the composition ratio of two contents filled in an elastic thin tube through laser-diode-based photoacoustic measurements, Japanese Journal of Applied Physics, vol. 63, no.3, 03SP25 (2024).

Photoacoustic imaging is considered useful for evaluating the effects of treatment because it has a good resolution to capture minute vascular lesions and changes in the progression of atherosclerosis, which is difficult to detect with conventional imaging methods. In this study, the authors prepared a thin silicone tube filled with a mixture of red ink and olive oil as a model that mimics arteriosclerosis. The tube was embedded in a soft phantom. Photoacoustic measurements were performed using 405 nm and 520 nm laser diodes. As a result, the 405 nm laser produced a higher photoacoustic signal as the oil concentration in the mixture increased, whereas the 520 nm laser produced lower photoacoustic signals as the oil concentration increased. By focusing on the difference in the optical absorption at different wavelengths between the red ink and oil, it was shown that there was a possibility of estimating the oil concentration from the ratio of photoacoustic signals between different wavelengths.